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What is the Krebs/TCA/Citric Acid cycle?

At its most basic, the TCA cycle is a mechanism which converts the fuel we consume - carbohydrates, fats and proteins - into special molecules called "reduced cofactors" which transport electrons t...
RM
Answered by Ryan M. • Biology tutor
4260 Views

How do you form questions in French?

Forming questions can be difficult because in French they do not have an equivalent of the auxiliary 'do' which we have in English and use for asking questions e.g. do you play rugby? In French, there are th...
JH
Answered by James H. • French tutor
4632 Views

What is the 'chain rule'?

The chain rule is incredibly useful when differentiating compositions of funcions. Until now you have really only met dy/dx as your derivative. By imagining dy/dx as a fraction, you can transform it into som...
JA
Answered by James A. • Maths tutor
5245 Views

When do I use être or avoir in the past?

Etre is used with verbs of motion such as Aller/Entrer/ Arriver. The full list is easy to remember using the MRS VANDERTRAMP technique. M-Monter R-Retourner S-Sortir V- Venir A-Arriver N-Naître D-Descendre E...
CR
4253 Views

When does the past participle change form if conjugated with the verb avere?

If the verb avere is in a compound past tense (passato prossimo/trapassato prossimo) and is preceded by a direct object pronoun (pronome diretto-mi, ti, lo, la, li, le) the verb avere must agree. For examle,...
CR
4520 Views